Alumina powder screening and conveying device

Abstract

The invention discloses an alumina powder screening and conveying device, which relates to the technical field of alumina screening and conveying, and comprises: a shell body, a plurality of supporting legs are arranged at the bottom of the shell body; a feeding assembly, the feeding assembly comprises an alumina powder bin and a discharge pipe, the discharge pipe is connected and arranged on one side of the top of the shell body, the alumina powder bin is connected and arranged on the top of the discharge pipe, and a star-shaped discharge valve is arranged on the discharge pipe; a screening and drying assembly; the double helical blades of the screen cylinder of the invention convey the agglomerated alumina to the first feed pipe, and then convey it to the screen cylinder for screening after crushing, which can effectively eliminate the agglomerated alumina, and no other equipment is required for further processing, thereby reducing the production process, and by conveying hot air to the transmission shaft of the hollow structure and the third feed screw, and then heating the shell body and the discharge bin, the alumina powder can be dried during the screening process, thereby improving the quality of the conveyed alumina.

Description

Technical Field

[0001] The invention relates to the technical field of alumina screening and conveying equipment, and in particular to an alumina powder screening and conveying device. Background Art

[0002] Alumina is a white amorphous powder, a compound of aluminum and oxygen, insoluble in water. It is commonly known as bauxite and corundum. It can be used as an abrasive, polishing powder, high-temperature refractory material, etc. It is used to manufacture refractory bricks, crucibles, porcelain, artificial gems, etc.

[0003] Alumina is the main raw material for aluminum electrolysis. During the production of primary aluminum electrolysis, alumina powder needs to be transported. However, alumina is prone to agglomeration when it is exposed to moisture during storage. If the agglomerated and damp alumina powder is transported externally, it will affect the subsequent processing and production. Traditional alumina powder screening and conveying equipment cannot crush the screened and agglomerated alumina in time, and it needs to be exported and then processed by other crushing equipment, which increases the production process. In addition, the alumina powder cannot be dried during the screening process, which will affect the quality of the transported alumina powder. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an alumina powder screening and conveying device. During the screening process of the alumina powder, the double spiral blades of the screen drum convey the agglomerated alumina to the first conveying pipe, and the agglomerated alumina is lifted and conveyed to the crushing assembly by the second conveying screw, and then conveyed to the screen drum for screening after being crushed. After repeated screening and crushing, the agglomerated alumina can be effectively eliminated, and no other equipment is required for processing, thereby reducing the production process. By conveying hot air to the hollow structure of the transmission shaft and the third conveying screw, and then heating the shell and the discharge bin, the alumina powder can be dried during the screening process, thereby improving the quality of the conveyed alumina.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an alumina powder screening and conveying device, comprising:

[0006] A shell, wherein a plurality of supporting legs are provided at the bottom of the shell;

[0007] A feeding assembly, the feeding assembly comprising an alumina powder bin and a feeding pipe, the feeding pipe is connected and arranged on one side of the top of the shell, the alumina powder bin is connected and arranged on the top of the feeding pipe, and a star-shaped discharge valve is arranged on the feeding pipe;

[0008] A screening and drying component, the screening and drying component comprises a first motor, a transmission shaft, a plurality of connecting rods, a pair of connecting ring plates, a screen drum and double helical blades, the first motor is arranged on the outer side wall of the shell, the transmission shaft is a hollow structure and is provided with a plurality of first air outlet holes, the transmission shaft is rotatably arranged in the shell and one end is connected to the output shaft of the first motor and the other end is connected to a first rotating joint, a first air inlet pipe is connected to the first rotating joint, the first air inlet pipe passes through the shell and is connected to an external heating air supply device, one end of each of the connecting rods is connected to the transmission shaft and the other end is connected to the connecting ring plate, the screen drum is arranged between a pair of connecting ring plates, and the double helical blades are arranged on the inner wall of the screen drum;

[0009] A crushing mechanism, the crushing mechanism comprises a first conveying pipe, a second motor, a second conveying screw, a second conveying pipe, a crushing assembly and a third conveying pipe, the first conveying pipe being vertically arranged on a side of the shell away from the first motor, a feed port being provided on the first conveying pipe, the second motor being arranged on the first conveying pipe, the second conveying screw being rotatably arranged in the first conveying pipe and one end being connected to the output shaft of the second motor, the second conveying pipe being arranged to be tilted downward at a certain angle, the high end side of which is connected to the position of the first conveying pipe near the top, and the low end side of which is connected to the crushing assembly, the crushing assembly being used to crush agglomerated aluminum oxide, the third conveying pipe being arranged to be tilted downward at a certain angle, the high end side of which is connected to the crushing assembly, and the low end side of which is connected to the feed pipe;

[0010] An exhaust cleaning component, the exhaust cleaning component is arranged on the top of the shell, and the exhaust cleaning component is used to discharge the wet steam in the shell and clean the screen drum;

[0011] A material feeding and drying component, the material feeding and drying component includes a discharge bin, a third material feeding screw, a fourth motor, a fifth material feeding pipe and a fourth material feeding screw. The discharge bin is connected and arranged at the bottom of the shell and corresponds to the position of the screen drum. The third material feeding screw is rotatably arranged in the discharge bin. The spiral blades and the spiral shaft of the third material feeding screw are both hollow structures and are connected and connected. The outer diameter of the spiral blades of the third material feeding screw increases from bottom to top and a plurality of second air outlets are opened at the bottom. The top of the spiral shaft of the third material feeding screw is connected with a second rotating joint, and the second rotating joint is connected with a second air inlet pipe. The second air inlet pipe runs through the discharge bin and is connected to an external heating air supply device. The bottom of the discharge bin is connected and arranged with a fourth material feeding pipe. The fourth material feeding pipe is arranged at a certain angle downward and the lower end side is connected and connected with the fifth material feeding pipe. A discharge valve is arranged on the fourth material feeding pipe. The fourth material feeding screw is rotatably arranged in the fifth material feeding pipe. The fourth motor is arranged at the bottom of the discharge bin to drive the third material feeding screw and the fourth material feeding screw to rotate.

[0012] Preferably, a material guide plate is provided in the shell and below the feed tube, and the transmission shaft rotates and penetrates the material guide plate.

[0013] Preferably, a first feeding screw is arranged on the transmission shaft and below the feeding pipe.

[0014] Preferably, a first bearing is provided between each of the connecting ring plates and the inner wall of the housing.

[0015] Preferably, the crushing assembly includes a crushing box, a third motor, a rotating shaft, a plurality of crushing blades and a plurality of blocks. The crushing box is arranged on the top of the shell, the lower end side of the second feed pipe is connected to the top of the crushing box, the high end side of the third feed pipe is connected to the side wall of the crushing box, the third motor is arranged on the outer wall of the crushing box, the output end of the third motor passes through the side wall of the crushing box and is connected to the rotating shaft, the plurality of crushing blades are equidistantly arranged on the rotating shaft, and the plurality of blocks are equidistantly arranged on the inner walls on both sides of the crushing box.

[0016] Preferably, the exhaust cleaning assembly includes an air collecting hood, an air outlet pipe, a pulse blowing pipe, an electromagnetic pulse valve and a plurality of blowing heads. The air collecting hood is connected to the top of the shell and is located above the sieve drum. The air outlet pipe is connected to the top of the air collecting hood. The pulse blowing pipe runs through the air collecting hood and one end is connected to the compressed air supply device. The electromagnetic pulse valve is arranged on the pulse blowing pipe. The plurality of blowing heads are arranged on the pulse blowing pipe and are located above the sieve drum.

[0017] Preferably, a fixed plate is provided on the fourth feed pipe, the fourth motor is provided on the fixed plate, the output shaft of the fourth motor passes through the fixed plate and is connected to the spiral shaft of the fourth feed screw, a first bevel gear is provided on the spiral shaft of the fourth feed screw, a second bevel gear is provided on the spiral shaft of the third feed screw, and the first bevel gear is meshingly connected with the second bevel gear.

[0018] Preferably, a plurality of fixing rods are provided on the inner wall of the discharge bin, and the plurality of fixing rods are connected to a limiting ring, a second bearing is provided on the inner ring of the limiting ring, the spiral shaft of the third feed screw passes through and is connected to the inner ring of the second bearing, a third bearing and a fourth bearing are respectively provided on the fourth feed pipe, and the spiral shafts of the third feed screw and the fourth feed screw pass through and are connected to the inner rings of the third bearing and the fourth bearing respectively.

[0019] The present invention provides an alumina powder screening and conveying device, which has the following beneficial effects:

[0020] 1. In the process of screening alumina powder, the double spiral blades of the screen drum of the present invention transport the agglomerated alumina to the first feed pipe, and the agglomerated alumina is lifted and transported to the crushing assembly by the second feed screw, and then transported to the screen drum for screening after crushing. After repeated screening and crushing, the agglomerated alumina can be effectively eliminated without the need for other equipment for processing, thereby reducing the production process. By conveying hot air to the hollow structure of the transmission shaft and the third feed screw, and then heating the shell and the discharge bin, the alumina powder can be dried during the screening process, thereby improving the quality of the conveyed alumina.

[0021] 2. The present invention sets a cleaning component on the air collecting hood, which can effectively clean the blocked sieve holes of the sieve drum to improve the screening effect of alumina powder; by setting a second bearing and a third bearing at both ends of the spiral shaft of the third feed screw, the stability of the third feed screw during rotation can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0023] Figure 2 A top view of the internal structure of the crushing box of the present invention;

[0024] Figure 3 For the present invention Figure 1 A magnified schematic diagram of part A;

[0025] Figure 4 For the present invention Figure 1 A magnified schematic diagram of part B;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the material guide plate of the present invention.

[0027] In the figure: 1, housing; 1-1, guide plate; 2, feed pipe; 3, alumina powder bin; 4, star-shaped discharge valve; 5, first motor; 6, transmission shaft; 6-1, first air outlet; 7, first feed screw; 8, connecting rod; 9, connecting ring plate; 9-1, first bearing; 10, screen drum; 11, double spiral blades; 12, first rotary joint; 13, first air inlet pipe; 14, first feed pipe; 14-1, feed port; 15, second motor; 16, second feed screw; 17, second feed pipe; 18, crushing box; 19, third motor; 20, rotating shaft; 21, crushing blade; 22, Block; 23, third feed pipe; 24, air collecting hood; 25, air outlet pipe; 26, pulse blowing pipe; 27, electromagnetic pulse valve; 28, blowing head; 29, discharge bin; 30, second air inlet pipe; 31, second rotary joint; 32, fixing rod; 33, limiting ring; 34, second bearing; 35, third feed screw; 35-1, second air outlet; 36, fourth feed pipe; 37, fourth motor; 38, fourth feed screw; 39, fifth feed pipe; 40, first bevel gear; 41, second bevel gear; 42, third bearing; 43, fourth bearing; 44, discharge valve; 45, fixing plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 The present invention provides a technical solution: an alumina powder screening and conveying device, comprising:

[0030] A shell 1, wherein a plurality of supporting legs are arranged at the bottom of the shell 1;

[0031] A feeding assembly, the feeding assembly comprises an alumina powder bin 3 and a feeding pipe 2, the feeding pipe 2 is connected and arranged on one side of the top of the shell 1, the alumina powder bin 3 is connected and arranged on the top of the feeding pipe 2, and a star-shaped discharge valve 4 is arranged on the feeding pipe 2;

[0032] A screening and drying component, the screening and drying component includes a first motor 5, a transmission shaft 6, a plurality of connecting rods 8, a pair of connecting ring plates 9, a screen drum 10 and double helical blades 11, the first motor 5 is arranged on the outer wall of the shell 1, the transmission shaft 6 is a hollow structure and is provided with a plurality of first air outlet holes 6-1, the transmission shaft 6 is rotatably arranged in the shell 1 and is connected to the output shaft of the first motor 5 at one end and is connected to a first rotary joint 12 at the other end, a first air inlet pipe 13 is connected to the first rotary joint 12, the first air inlet pipe 13 passes through the shell 1 and is connected to an external heating air supply device, one end of each connecting rod 8 is connected to the transmission shaft 6 and the other end is connected to the connecting ring plate 9, the screen drum 10 is arranged between a pair of connecting ring plates 9, and the double helical blades 11 are arranged on the inner wall of the screen drum 10;

[0033] The crushing mechanism includes a first conveying pipe 14, a second motor 15, a second conveying screw 16, a second conveying pipe 17, a crushing assembly and a third conveying pipe 23. The first conveying pipe 14 is vertically arranged on a side of the shell 1 away from the first motor 5. A feed port 14-1 is provided on the first conveying pipe 14. The second motor 15 is arranged on the first conveying pipe 14. The second conveying screw 16 is rotatably arranged in the first conveying pipe 14 and one end is connected to the output shaft of the second motor 15. The second conveying pipe 17 is tilted downward at a certain angle, and the high end side is connected to the position of the first conveying pipe 14 near the top, and the low end side is connected to the crushing assembly. The crushing assembly is used to crush agglomerated aluminum oxide. The third conveying pipe 23 is tilted downward at a certain angle, and the high end side is connected to the crushing assembly, and the low end side is connected to the discharge pipe 2.

[0034] An exhaust cleaning component is arranged on the top of the shell 1 and is used to discharge wet steam in the shell 1 and clean the screen drum 10;

[0035] The feeding and drying component includes a discharge bin 29, a third feeding screw 35, a fourth motor 37, a fifth feeding pipe 39 and a fourth feeding screw 38. The discharge bin 29 is connected and arranged at the bottom of the shell 1 and corresponds to the position of the screen drum 10. The third feeding screw 35 is rotatably arranged in the discharge bin 29. The spiral blades and the spiral shaft of the third feeding screw 35 are both hollow structures and are connected. The outer diameter of the spiral blades of the third feeding screw 35 increases from bottom to top and a plurality of second air outlet holes 35-1 are opened at the bottom. The top of the spiral shaft of the third feeding screw 35 is connected to the third feeding screw 35. Two rotary joints 31, the second rotary joint 31 is connected to the second air inlet pipe 30, the second air inlet pipe 30 runs through the discharge bin 29 and is connected to the external heating air supply device, the bottom of the discharge bin 29 is connected to a fourth feed pipe 36, the fourth feed pipe 36 is tilted downward at a certain angle and the lower end is connected to the fifth feed pipe 39, a discharge valve 44 is provided on the fourth feed pipe 36, the fourth feed screw 38 is rotatably arranged in the fifth feed pipe 39, and the fourth motor 37 is arranged at the bottom of the discharge bin 29 to drive the third feed screw 35 and the fourth feed screw 38 to rotate.

[0036] In this embodiment, the alumina powder bin 3 is used to store or transfer alumina powder, and the star-shaped discharge valve 4 is used to control the discharge amount of alumina in the alumina powder bin 3. When the first motor 5 drives the transmission shaft 6 to rotate, the transmission shaft 6 drives a pair of connecting ring plates 9 to rotate through a plurality of connecting rods 8, and the pair of connecting ring plates 9 drives the screen drum 10 therebetween to rotate. When the screen drum 10 rotates, it drives the double helical blades 11 arranged on its inner wall to rotate, so that the alumina falling from the discharge pipe 2 can enter the screen drum 10 and then move in the screen drum 10 toward the first feed pipe 14. During the movement, The sieve drum 10 sieves the alumina powder, so that the sieved alumina powder falls into the discharge bin 29, and the block alumina that has not been sieved by the sieve drum 10 enters the first feeding drum through the feed port 14-1. The second motor 15 drives the second feeding screw 16 to rotate to transport the alumina in the sieve drum 10 to the crushing assembly. After the agglomerated alumina is crushed by the crushing assembly, it is transported to the discharge pipe 2 through the third feeding pipe 23. The connection position of the third feeding pipe 23 and the discharge pipe 2 is below the star-shaped discharge valve 4, so that the crushed alumina can directly enter the discharge pipe 2. The aluminum oxide powder in the discharge bin 29 is fed into the housing 1, and then falls into the discharge bin 29 after being screened by the sieve drum 10. The fourth motor 37 can drive the third feeding screw 35 and the fourth feeding screw 38 to rotate synchronously. When the aluminum oxide powder in the discharge bin 29 is dried, the third feeding screw 35 rotates in the opposite direction, so that the aluminum oxide powder in the discharge bin 29 is turned from bottom to top. During the screening process, hot air is transported to the first air inlet pipe 13 and the second air inlet pipe 30 through an external hot air supply device, and the hot air is blown out from the first air outlet 6-1 and the second air outlet 35-1 respectively to dry the sieve drum 1. 0 and the alumina powder in the discharge bin 29 are dried, and the wet steam generated after drying is discharged from the outlet pipe 25. When the drying is completed, the discharge valve 44 on the fourth feeding pipe 36 is opened, and the fourth motor 37 drives the third feeding screw 35 to rotate forward, so that the fourth feeding screw 38 discharges the alumina powder from the fifth feeding pipe 39. After a period of use, the compressed air supply device can be used to supply air to the pulse blowing pipe 26, open the electromagnetic pulse valve 27, and the compressed air is sprayed from the multiple blowing heads 28 onto the screen drum 10 to clean the residual materials on the inner wall of the screen drum 10.

[0037] As an embodiment of the present invention, a material guide plate 1 - 1 is disposed in the housing 1 and below the feed tube 2 , and the transmission shaft 6 rotates and penetrates the material guide plate 1 - 1 .

[0038] In this embodiment, the guide plate 1 - 1 is used to guide the aluminum oxide dropped from the feed pipe 2 into the screen drum 10 , so as to facilitate the screening of the aluminum oxide.

[0039] As an embodiment of the present invention, a first feeding screw 7 is provided on the transmission shaft 6 and below the feeding pipe 2 .

[0040] In this embodiment, when the transmission shaft 6 drives the first feeding screw 7 to rotate, the first feeding screw 7 transports the aluminum oxide powder on the guide plate 1 - 1 to the screen drum 10 , thereby improving the transportation efficiency.

[0041] As an embodiment of the present invention, a first bearing 9 - 1 is arranged between each connecting ring plate 9 and the inner wall of the housing 1 .

[0042] In this embodiment, the first bearing 9 - 1 is used to reduce the friction between the connecting ring plate 9 and the inner wall of the housing 1 .

[0043] As an embodiment of the present invention, the crushing assembly includes a crushing box 18, a third motor 19, a rotating shaft 20, a plurality of crushing blades 21 and a plurality of blocks 22. The crushing box 18 is arranged at the top of the shell 1, the lower end side of the second feed pipe 17 is connected to the top of the crushing box 18, the high end side of the third feed pipe 23 is connected to the side wall of the crushing box 18, the third motor 19 is arranged on the outer wall of the crushing box 18, the output end of the third motor 19 passes through the side wall of the crushing box 18 and is connected to the rotating shaft 20, the plurality of crushing blades 21 are equidistantly arranged on the rotating shaft 20, and the plurality of blocks 22 are equidistantly arranged on the inner walls on both sides of the crushing box 18.

[0044] In this embodiment, when the third motor 19 drives the rotating shaft 20 to rotate, the rotating shaft 20 drives the multiple crushing blades 21 to rotate. The multiple crushing blades 21 cooperate with the multiple blocks 22 to crush the agglomerated aluminum oxide. Each crushing blade 21 is arranged between each two adjacent blocks 22, and the crushing box 18 is arranged on the shell 1 through multiple support rods.

[0045] As an embodiment of the present invention, the exhaust cleaning assembly includes an air collecting hood 24, an air outlet pipe 25, a pulse blowing pipe 26, an electromagnetic pulse valve 27 and a plurality of blowing heads 28. The air collecting hood 24 is connected and arranged at the top of the shell 1 and is located above the sieve drum 10. The air outlet pipe 25 is connected and communicated with the top of the air collecting hood 24. The pulse blowing pipe 26 runs through the air collecting hood 24 and one end is connected to the compressed air supply device. The electromagnetic pulse valve 27 is arranged on the pulse blowing pipe 26. The plurality of blowing heads 28 are arranged on the pulse blowing pipe 26 and are located above the sieve drum 10.

[0046] In this embodiment, when the alumina in the sieve drum 10 and the discharge bin 29 is dried, the generated wet steam is discharged outward from the outlet pipe 25. The first motor 5 is frequency-controlled. When the sieve drum 10 is cleaned, the star-shaped unloading valve 4 is closed, and the first motor 5 drives the sieve drum 10 to rotate slowly. The compressed air supply device delivers compressed air to the pulse blowing pipe 26. When the electromagnetic pulse valve 27 is opened, compressed air is blown onto the sieve drum 10 from multiple blowing heads 28, so that the alumina blocked in the sieve holes of the sieve drum 10 is blown off. The first motor 5 continuously adjusts the circumferential position of the sieve drum 10, and cleans the sieve drum 10 comprehensively through repeated blowing and cleaning.

[0047] As an embodiment of the present invention, a fixed plate 45 is provided on the fourth feed pipe 36, and the fourth motor 37 is provided on the fixed plate 45. The output shaft of the fourth motor 37 passes through the fixed plate 45 and is connected to the screw shaft of the fourth feed screw 38. A first bevel gear 40 is provided on the screw shaft of the fourth feed screw 38, and a second bevel gear 41 is provided on the screw shaft of the third feed screw 35. The first bevel gear 40 is meshed and connected with the second bevel gear 41.

[0048] In this embodiment, when the fourth motor 37 is started, the fourth motor 37 drives the screw shaft of the fourth feed screw 38 to rotate, the screw shaft of the fourth feed screw 38 drives the first bevel gear 40 arranged thereon to rotate, the first bevel gear 40 drives the meshing second bevel gear 41 to rotate, and the second bevel gear 41 drives the screw shaft of the third feed screw 35 to rotate, thereby realizing the synchronous rotation of the third feed screw 35 and the fourth feed screw 38.

[0049] As an embodiment of the present invention, a plurality of fixing rods 32 are provided on the inner wall of the discharge bin 29, and the plurality of fixing rods 32 are connected to a limiting ring 33. A second bearing 34 is provided on the inner ring of the limiting ring 33, and a spiral shaft of the third feed screw 35 passes through and is connected to the inner ring of the second bearing 34. A third bearing 42 and a fourth bearing 43 are respectively provided on the fourth feed pipe 36, and a spiral shaft of the third feed screw 35 and a spiral shaft of the fourth feed screw 38 pass through and are connected to the inner rings of the third bearing 42 and the fourth bearing 43 respectively.

[0050] In this embodiment, one end of each fixing rod 32 is arranged on the inner wall of the discharge bin 29, and the other end is connected to the limiting ring 33 to limit the limiting ring 33. The outer ring of the second bearing 34 is connected to the inner ring of the limiting ring 33. The inner ring of the second bearing 34 is connected to the spiral shaft of the third feed screw 35 near the top. The third bearing 42 is connected to the spiral shaft of the third feed screw 35 near the bottom to limit the spiral shaft of the third feed screw 35 to prevent the third feed screw 35 from shaking during rotation. The fourth bearing 43 also limits the spiral shaft of the fourth feed screw 38.

[0051] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle. The electrical connection is completed in the order of working in sequence. The motor is connected to the connecting part through a reducer. The detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0052] The working principle and use process of the present invention are as follows: when in use, hot air (preferably hot air with high temperature and low wind pressure) is transported to the first air inlet pipe 13 and the second air inlet pipe 30 through an external hot air supply device, the hot air in the first air inlet pipe 13 is transported to the hollow part of the transmission shaft 6 through the first rotary joint 12, and then blown out from the multiple first air outlet holes 6-1 opened on the transmission shaft 6, the hot air in the second air inlet pipe 30 is transported to the hollow part of the spiral shaft of the third feed screw 35 through the second rotary joint 31, and then flows to the hollow part of the spiral blade of the third feed screw 35, and is blown out from the multiple second air outlet holes 35-1 opened at the bottom of the spiral blade of the third feed screw 35, so as to heat the shell 1 and the discharge bin 29, so that the hot air in the first air inlet pipe 13 is transported to the hollow part of the spiral shaft of the third feed screw 35 through the second rotary joint 31, and then flows to the hollow part of the spiral blade of the third feed screw 35, and is blown out from the multiple second air outlet holes 35-1 opened at the bottom of the spiral blade of the third feed screw 35, so as to heat the shell 1 and the discharge bin 29, so as to make the hot air in the first air inlet pipe 13 be transported to the hollow part of the spiral shaft of the third feed screw 35, and then ... During the aluminum powder screening process, drying treatment is carried out, the star-shaped discharge valve 4 is started, the aluminum oxide in the aluminum oxide powder bin 3 is transported to the shell 1, and the aluminum oxide powder falls from the discharge pipe 2 to the guide plate 1-1, and the first motor 5 is started. The first motor 5 drives the transmission shaft 6 to rotate, and the transmission shaft 6 drives the first feeding screw 7 and multiple connecting rods 8 to rotate. The multiple connecting rods 8 drive a pair of connecting ring plates 9 to rotate, and the pair of connecting ring plates 9 drive the screen drum 10 to rotate, and the screen drum 10 drives the double helical blades 11 to rotate. When the first feeding screw 7 rotates, the aluminum oxide powder on the guide plate 1-1 is transported to the filter drum (through the gaps between the multiple connecting rods 8), and when the double helical blades 11 rotate, the aluminum oxide powder is transported to the direction of the first feeding pipe 14. The screen drum 10 rotates to oxygen. The alumina powder is screened, and the screened alumina falls into the discharge bin 29. The agglomerated alumina is transported to the direction of the first feeding pipe 14 by the double spiral blades 11, so that the agglomerated alumina enters the interior through the feed port 14-1 opened on the first feeding pipe 14, and the second motor 15 is started. The second motor 15 drives the second feeding screw 16 to rotate. The second feeding screw 16 transports the agglomerated alumina from bottom to top and enters the crushing box 18 through the second feeding pipe 17. The third motor 19 drives the rotating shaft 20 to rotate, and the rotating shaft 20 drives the multiple crushing blades 21 arranged thereon to rotate. The multiple crushing blades 21 cooperate with the multiple blocks 22 to crush the agglomerated alumina. The crushed alumina enters the In the discharge pipe 2 (an inclined plate can be provided at the bottom of the crushing box 18 to make the discharge smooth), after repeated screening and crushing, the alumina powder can pass through the screen drum 10 and all fall into the discharge bin 29. The discharge valve 44 on the fourth feed pipe 36 is initially closed, and the fourth motor 37 is started. The fourth motor 37 drives the third feed screw 35 and the fourth feed screw 38 to rotate synchronously in the opposite direction. The third feed screw 35 turns the alumina powder in the discharge bin 29 from bottom to top to increase the residence time of the alumina powder in the discharge bin 29, so as to thoroughly dry the alumina powder in the discharge bin 29. The wet steam generated during drying is discharged from the air outlet pipe 25 at the top of the gas collecting hood 24. After drying for a period of time, the discharge valve 44 is opened, and the fourth motor 37 rotates forward.The third feeding screw 35 conveys the aluminum oxide powder to the fourth feeding pipe 36, and the fourth feeding screw 38 conveys the aluminum oxide powder in the fourth feeding pipe 36 to the outside from the fifth feeding pipe 39; when the sieve holes on the screen drum 10 are blocked after a period of use, the operation of the star-shaped discharge valve 4 is stopped, the hot air supply device is stopped from conveying hot air to the shell 1 and the discharge bin 29, and the external compressed air supply device is started. The external compressed air supply device conveys compressed air to the pulse blowing pipe 26. At this time, the first motor 5 drives the screen drum 10 to rotate slowly, and the electromagnetic pulse valve 27 is opened. The compressed air is blown to the outer wall of the screen drum 10 through multiple blowing heads 28 to back-blow and clean the screen drum 10. The first motor 5 continuously adjusts the circumferential position of the screen drum 10, and the screen drum 10 is fully cleaned by repeatedly controlling the opening and closing of the electromagnetic pulse valve 27.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An alumina powder screening and conveying device, characterized in that: include: A shell (1), wherein a plurality of supporting legs are arranged at the bottom of the shell (1); A feeding assembly, the feeding assembly comprising an alumina powder bin (3) and a feeding pipe (2), the feeding pipe (2) being arranged in communication with one side of the top of the housing (1), the alumina powder bin (3) being arranged in communication with the top of the feeding pipe (2), and the feeding pipe (2) being provided with a star-shaped discharge valve (4); A screening and drying component, the screening and drying component comprising a first motor (5), a transmission shaft (6), a plurality of connecting rods (8), a pair of connecting ring plates (9), a screen drum (10) and double helical blades (11); the first motor (5) is arranged on the outer wall of a housing (1); the transmission shaft (6) is a hollow structure and is provided with a plurality of first air outlet holes (6-1); the transmission shaft (6) is rotatably arranged in the housing (1) and one end of the transmission shaft is connected to the output shaft of the first motor (5) and the other end is connected to a first rotating joint (12); the first rotating joint (12) is connected to a first air inlet pipe (13); the first air inlet pipe (13) passes through the housing (1) and is connected to an external hot air supply device; one end of each connecting rod (8) is connected to the transmission shaft (6) and the other end is connected to the connecting ring plate (9); the screen drum (10) is arranged between the pair of connecting ring plates (9); and the double helical blades (11) are arranged on the inner wall of the screen drum (10); A crushing mechanism, the crushing mechanism comprising a first conveying pipe (14), a second motor (15), a second conveying screw (16), a second conveying pipe (17), a crushing assembly and a third conveying pipe (23), wherein the first conveying pipe (14) is vertically arranged on a side of the housing (1) away from the first motor (5), a feed port (14-1) is provided on the first conveying pipe (14), the second motor (15) is arranged on the first conveying pipe (14), the second conveying screw (16) is rotatably arranged in the first conveying pipe (14) and one end of the second conveying screw (16) is connected to the output shaft of the second motor (15), the second conveying pipe (17) is tilted downward at a certain angle, the high end side is connected to the position near the top of the first conveying pipe (14), and the low end side is connected to the crushing assembly, the crushing assembly is used to crush agglomerated aluminum oxide, the third conveying pipe (23) is tilted downward at a certain angle, the high end side is connected to the crushing assembly, and the low end side is connected to the feed pipe (2); An exhaust cleaning component, the exhaust cleaning component being arranged on the top of the shell (1), and being used to discharge wet steam in the shell (1) and clean the sieve drum (10); A material feeding and drying component, the material feeding and drying component comprises a discharge bin (29), a third material feeding screw (35), a fourth motor (37), a fifth material feeding pipe (39) and a fourth material feeding screw (38), the discharge bin (29) being connected and arranged at the bottom of the shell (1) and corresponding to the position of the screen drum (10), the third material feeding screw (35) being rotatably arranged in the discharge bin (29), the spiral blades and spiral shaft of the third material feeding screw (35) being both hollow structures and being connected and communicating, the outer diameter of the spiral blades of the third material feeding screw (35) increasing from bottom to top and a plurality of second air outlet holes (35-1) being opened at the bottom, the top of the spiral shaft of the third material feeding screw (35) being connected with a second rotating joint The first rotary joint (31) is provided with a second air inlet pipe (30), the second air inlet pipe (30) passes through a discharge bin (29) and is connected to an external heating air supply device, a fourth feed pipe (36) is provided at the bottom of the discharge bin (29), the fourth feed pipe (36) is tilted downward at a certain angle and the lower end is connected to a fifth feed pipe (39), a discharge valve (44) is provided on the fourth feed pipe (36), the fourth feed screw (38) is rotatably provided in the fifth feed pipe (39), and the fourth motor (37) is provided at the bottom of the discharge bin (29) to drive the third feed screw (35) and the fourth feed screw (38) to rotate.

2. The alumina powder screening and conveying device according to claim 1, characterized in that: A material guide plate (1-1) is arranged inside the housing (1) and below the material discharge pipe (2), and the transmission shaft (6) is rotatably disposed on and penetrates the material guide plate (1-1).

3. The alumina powder screening and conveying device according to claim 2, characterized in that: A first feeding screw (7) is arranged on the transmission shaft (6) and below the feeding pipe (2).

4. The alumina powder screening and conveying device according to claim 1, characterized in that: A first bearing (9-1) is arranged between each connecting ring plate (9) and the inner wall of the housing (1).

5. The alumina powder screening and conveying device according to claim 1, characterized in that: The crushing assembly comprises a crushing box (18), a third motor (19), a rotating shaft (20), a plurality of crushing blades (21) and a plurality of blocks (22); the crushing box (18) is arranged at the top of the housing (1); the lower end side of the second material conveying pipe (17) is connected to the top of the crushing box (18); the higher end side of the third material conveying pipe (23) is connected to the side wall of the crushing box (18); the third motor (19) is arranged on the outer wall of the crushing box (18); the output end of the third motor (19) passes through the side wall of the crushing box (18) and is connected to the rotating shaft (20); the plurality of crushing blades (21) are equidistantly arranged on the rotating shaft (20); and the plurality of blocks (22) are equidistantly arranged on the inner walls on both sides of the crushing box (18).

6. The alumina powder screening and conveying device according to claim 1, characterized in that: The exhaust cleaning component comprises an air collecting hood (24), an air outlet pipe (25), a pulse blowing pipe (26), an electromagnetic pulse valve (27) and a plurality of blowing heads (28); the air collecting hood (24) is connected and arranged at the top of the shell (1) and is located above the sieve drum (10); the air outlet pipe (25) is connected and communicated with the top of the air collecting hood (24); the pulse blowing pipe (26) passes through the air collecting hood (24) and one end is connected to a compressed air supply device; the electromagnetic pulse valve (27) is arranged on the pulse blowing pipe (26); and the plurality of blowing heads (28) are arranged on the pulse blowing pipe (26) and are located above the sieve drum (10).

7. The alumina powder screening and conveying device according to claim 1, characterized in that: The fourth material delivery pipe (36) is provided with a fixed plate (45), the fourth motor (37) is provided on the fixed plate (45), the output shaft of the fourth motor (37) passes through the fixed plate (45) and is connected to the screw shaft of the fourth material delivery screw (38), the screw shaft of the fourth material delivery screw (38) is provided with a first bevel gear (40), the screw shaft of the third material delivery screw (35) is provided with a second bevel gear (41), and the first bevel gear (40) is meshingly connected with the second bevel gear (41).

8. The alumina powder screening and conveying device according to claim 7, characterized in that: A plurality of fixing rods (32) are arranged on the inner wall of the discharge bin (29), and the plurality of fixing rods (32) are connected to a limiting ring (33). A second bearing (34) is arranged on the inner ring of the limiting ring (33). The screw shaft of the third material feeding screw (35) passes through and is connected to the inner ring of the second bearing (34). A third bearing (42) and a fourth bearing (43) are respectively arranged on the fourth material feeding pipe (36). The screw shafts of the third material feeding screw (35) and the fourth material feeding screw (38) pass through and are connected to the inner rings of the third bearing (42) and the fourth bearing (43).

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